Arc Flash Arrestor Switch, 030 Amp CB, 3 Pole, 42 kA @ 480 VAC, 100 kA @ 240 VAC, Nema 12 (AKA: Sequester Switch, Disconnect Switch, Safety Switch, Enclosed Circuit Breaker)
Fast trip enclosed circuit breaker. Pre-engineered for low incident energy on downstream equipment. Call, email, or use our contact form to get more information on our products. A subject matter expert is ready and able to help.
Use this product to lower incident energy (and PPE levels) on equipment downstream and/or sequester a main disconnect out of a control panel to isolate the main incoming source of power. A fault clear time (FCT) of 50 milliseconds or less is highly desirable in arc flash remediation work. Using this product the FCT is expected to be less than 20 milliseconds with downstream values of incident energy less than 0.50 cal/cm^2. Fuses are not used in our products because they are not resettable, not adjustable, and cannot operate fast enough. Even though fuses can theoretically open faster than circuit breakers there is seldom enough current available to open a fuse faster than a circuit breaker. A circuit breaker can be adjusted to open very fast throughout a broad range of applications even at low current levels. As circuit currents go up this advantage that circuit breakers have over fuses becomes more pronounced. Test parameters: 1500 kVA transformer delta/wye solidly grounded with 6% impedance, 50 feet of 480 volt bus to distribution equipment, 50 feet of cable to the ZMAC switch, 50 feet of cable to the equipment being remediated. Analysis completed in SKM Version 8. Consulting firms to use TCC curve Siemens HED4.
|Application Voltage||208/240/480/600 Volts|
|Device Rating||30 Amps|
|Typical Fault Clear Time||19 mS|
|Typical Incident Energy||less than 0.50 cal/cm^2|
|Long Time Settings||None|
|Short Time Settings||None|
|Ground Fault Settings||None|
|CB Terminal Range||6 AWG – 3/0 AWG CU / AL|
|Neutral Terminal Range||6 AWG – 350 kcmil CU / AL|
|Dimensions||31.4" H x 9.1" W x 5.6" D|